◆盲亀の浮木 Mouki no fuboku.
- 解釈：大海中に棲み、百年に一度だけ水面に上がる盲目の亀が、海上に漂う一本の浮木の穴に収まった寓話（ぐうわ）。出会うのが極めて困難なこと。また、滅多にない好運に巡り会うことのたとえ。
- Literal：Wood in which the blind tortoise floated.
- Interpretation：It is extremely difficult for it to come. It is to come across rare good fortune. It is as hard as for a camel to pass through the eye of a needle.
- 類義：一眼（いちがん）の亀、浮木に乗るが如し。盲亀も時に会う。